Why i am unable to use Collectors in my code in java Stream? [closed]

import static java.util.stream.Collectors.*; import java.util.*; import java.lang.*; //import java.util.Collections; public class HelloWorld{ public static void main(String []args){ System.out.println("Hello World"); List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl"); List<String> filtered = strings.stream().filter(string -> !string.isEmpty()).collect(Collectors.toList()); } } 

output

/tmp/java_tdo3eB/HelloWorld.java:10: error: cannot find symbol List<String> filtered = strings.stream().filter(string -> !string.isEmpty()).collect(Collectors.toList()); ^ symbol: variable Collectors location: class HelloWorld 1 error 

So i query is why i am unable to use Collectors as i have import that class also

1 Answer

It's your imports. Do them like this:

package experiments; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; /** * * @author Luc Talbot */ public class HelloWorld { public static void main(String []args){ System.out.println("Hello World"); List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl"); List<String> filtered = strings.stream() .filter(string -> !string.isEmpty()) .collect(Collectors.toList()); } } 

Output is:

run: Hello World BUILD SUCCESSFUL (total time: 0 seconds)